Corrected the default theme

Change-Id: I6b78eece5a8b692931f02ec3d7d0c8c0d9acdd7a
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 27f1d66..e7212d2 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -175,7 +175,7 @@
         <activity android:name=".activities.ContactsFrontDoor"
             android:label="@string/contactsList"
             android:icon="@mipmap/ic_launcher_contacts"
-            android:theme="@android:style/Theme.NoTitleBar"
+            android:theme="@style/ContactBrowserTheme"
         >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />